As early as 2006, Amorebieta expressed his interest in playing for the Venezuelan national team.[20] However, according to FIFA rules at the time, he should have switched his affiliation prior to the age of 21, having previously played for Spain's youth teams.[21] FIFA removed the rule in 2009,[22] and talks between the player and the Venezuelan Football Federation resumed.

Finally, on 2 September 2011, Amorebieta made his senior debut in a friendly with Argentina, a 0–1 loss.[23] On 11 October, against the same opponent but for the 2014 FIFA World Cupqualifying campaign, he scored in a 1–0 home win, which signified Venezuela's first-ever win against the Albiceleste in the tournament.[24]